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 以2010年台风"鲇鱼"(编号1013)为例,调查闽东主要海防林树种台风受灾情况,并对其影响因子进行分析,结果表明:1)不同树种受害程度差异明显,阔叶树种受害重于针叶树种,平均受害级和受害指数分别高出79.1%和76.7%。其中,桉树受灾最重,平均受害级和受害指数分别比湿地松、木麻黄高出90.5%、36.2%和86.7%、36.6%。受灾类型中,折干现象最严重,比例高达40.7%。2)林木不同形态特征受灾程度差异显著,折干类型集中于12～14cm径级,比例为56.8%,倒伏、掘根类型集中10～12cm,比例为57.9%,弯干、断稍现象径级分布较均匀,但同在14cm比例最高,分别为28.6%和18.3%。林木抗风性能与植株尖削度成正相关,而与树高、树冠面积、树冠相对高度成负相关。3)地形条件是影响林木受灾的重要因素,表现为受灾程度迎风坡大于背风坡,陡坡大于缓坡,同一坡向上,迎风坡下腹大于上腹,背风坡正好相反。4)割脂对湿地松抗风性能有较大影响,割脂林木受害指数比未割脂高40.6%,因割脂发生折干植株比例为92.7%。 更多还原

【Abstract】 Taking the typhoon Megi in 2010 as a case,this paper investigated its damage to the main coastal shelterbelt forests in eastern Fujian,and analyzed the related affecting factors.The damaged degree had an obvious difference among the tree species.Broadleaf species were more severely damaged than coniferous species,with the mean damage grade and damage index of broadleaf species being 79.1% and 76.7% higher than those of the coniferous species,respectively.Among the broadleaf species,Eucalyptus re... 更多还原